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Home Water Tanks Slimline Water Tanks & Pumps

A great choice for residential properties, are our slimline water tanks and pumps.

Our slimline water tanks are engineered to fit snugly beside your home or fence, delivering maximum water storage with minimal space. Available in capacities from 600 L up to 5,000 L, we also offer the 2,020 L Builder Tank, which includes an integrated pump and household changeover system for toilets and washing machines.

Designed for Australian living, each slim water tank comes in 17 Colourbond-style finishes, includes durable fittings (mosquito-proof leaf screen, 90 mm overflow, brass threaded outlet), and delivers reliable water storage without overpowering your outdoor space.

Proudly Australian-made and certified, our slimline rainwater tanks stand up to local weather and are accessible via over 1,600 agricultural and plumbing stores. We deliver water tanks across Melbourne, regional VIC, Adelaide, SA, and the NSW Riverina region, helping you stay water-wise with reliable storage.

Slimline Tank & Household Pump

Slimline Tank and Household Pump Set Up

View range Slimline Tank & Household Pump

PCST1050GPS

Slimline Tank & Garden Pump

Slimline Tank and Garden Pump Setup

View range Slimline Tank & Garden Pump

Slimline Tank Only

Slimline Tanks - perfect for narrow spaces

View range Slimline Tank Only

Find the right water tank for you

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Slimline Tank 600ltr

PCST600

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Slimline Tank 1,050ltr

PCST1050

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PCST1050GPS

Slimline Tank 1,050ltr & Garden Pump

PCST1050GPS

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Slimline Tank 2,000ltr & Garden Pump

PCST2000GPS

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Slimline Tank 1,050ltr & Household Pump

PCST1050AP

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Slimline Tank 2,000ltr

PCST2000

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Polychoice Slimline Tank 2,000ltr & Submersible Pump System

PCST2000AP

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Slimline Tank 2,020ltr & Hyjet Pump (multi storey)

BSLT2020H5

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Slimline Tank 2,020ltr & Hyjet Pump (single storey)

BSLT2020H4

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Slimline Tank 3,000ltr & Garden Pump

PCST3000GPS

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Slimline Tank 3,000ltr

PCST3000

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Polychoice Slimline Tank 3,000ltr & Submersible Pump System

PCST3000AP

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RRP $2,185

Slimline Tank 5,000ltr

PCST5000

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Slimline Tank 5,000ltr & Garden Pump

PCST5000GPS

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Slimline Tank 5,000ltr & Household Pump

PCST5000AP

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Food Grade

Food-grade polyethylene, certified to AS/NZS4020, the Australian standard for drinking water

Quality Assurance

Polymaster is certified for the international standard for quality management ISO9001

Product Certification

Standard AS/NZS 4766:2006 for peace of mind. Licence no. BMP657671 & BMP650824

Find your local distributor store

Polymaster’s water tanks are available across Victoria, South Australia, New South Wales, and South-East Queensland. As leading Australian storage tank manufacturers, we offer poly rainwater tanks in various sizes to suit rural, residential, and industrial applications. No matter your location or rainfall zone, we have a storage tank solution to suit your needs and budget.

I am proud to supply this feedback as it has been a long time since I was treated so amazingly well as a customer until I dealt with Polymaster. A) received excellent Pre Sales & Service from your dealer, Martha at Electel. B) Then 10 days before delivery I received a positive call from a polite young lady who ran through the complete scope of the order. To say I was appreciative was an understatement. Wished more companies had your service commitment / DNA. C) Then a day before delivery I received a polite phone call from a truck driver who introduced himself as your driver and ran through the logistics / offloading etc. Said he couldn’t give me an exact time but would ring me in morning to advise exact ETA. I have never met a truck driver who was so organised. All of the above culminated in to me being blown away with Polymaster’s outstanding customer service. Thank you very much and please pass my feedback onto your Mgr Director. It was a pleasure to deal with a company who is so transparent and organised, congrats.

G.C

Callignee, VIC

From entering details online and then talking with Tony Columbro to ensure I had details correct to then the text messages when the tank was ready. Then notified it was loaded and on its way to its new home. The whole process was professional and super smooth. Love the tank.

H.M

Nyah, VIC

Once tank was ordered it was confirmed and outlets checked . Delivery day was advised and driver was excellent . Great company to deal with.

D.P

Hepburn Springs, VIC

Good communication from Polymaster and delivered without a problem. Very happy with the quality of Polymaster products too.

Anonymous

Thanks to the driver, Bruce for delivery to a spot made difficult by recent rain. Managed to get tanks to their right spots. Good effort!

Anonymous

Sales people were excellent in providing updates to delivery and delivery driver also keep me informed of delivery times and helpful with information regarding the tank.

A.G

Great customer service especially Rachel. Also the driver was extremely helpful and professional in his handling of his job. Tank arrived on time as promised. The only little thing is that the tank was not put on position but close for us to push it the the foundation. Definitely we will order our next tank from them. Just recommended my friend to buy from Polymaster.

Anonymous

Good price. Great communication. On time friendly delivery service. Brilliant. Oh and the product is second to none.

G.O

Very happy with the product, also very happy with all the text messages telling me how the production was going. Will definitely be buying another tank from you in the future.

K.S

Besides the delivery arriving a day early the entire experience was excellent. Tim was excellent and did everything possible to help out to make sure the tanks were put in the best place. Thanks very much."

A.J

Loch, VIC

Ecstatic with delivery made by Mark Sinclair today - haven't had good old service like this in a very long time. Mark was polite, helpful & an absolute bloody gem. Highly recommend Polymaster to everyone.

C.C

Scarsdale, VIC

Easy to deal with. Prompt delivery. Courteous and friendly delivery driver. Great experience."

B.E

Table Top, NSW

My experience was excellent. I don't know how it could be better. Everything worked exactly as I hoped.

I.S

Second Valley, SA

The customer service was fantastic with a step by step walk through on the setup of the tanks. The recommendations on how to get the best set up of the tank fittings pump positioning. To the delivery of the tanks and the positioning on the ground.

Ben

"From start to finish it was nothing but a great experience. Very professional. Great company with great staff."

Anonymous

Over the moon with the quality of the tanks and the service ????

S.O

Burra North, SA

Both truck drivers are excellent. Very helpful. All tanks are wonderful. Very quick delivery after placing order. Had phone calls from Polymaster to check tank details and progress of delivery.

Neil Winter

Murgheboluc, VIC

"Great customer service from office, keeping me up to date with delivery time etc. Delivery man mark was on time, knowledgeable and did a fab job getting in a tight driveway. Very happy with my tank thank you."

Kerry Marsh

Ocean Grove, VIC

First class service. First class product.

Anonymous

We’ve found working with Polymaster to be a positive experience. The quality of the products which we have used has been very high, and the willingness and technical capacity of the staff to tackle non-routine engineering modifications has given us confidence in the finished build.

P. Baker

Land Energy Pty Ltd

The decision to sell Polymaster tanks to my customers is an easy one due to the fact that I strongly believe they are the best quality tanks on the market and I can confidently stand by the product I am supplying.

David Hartwig

Plumbing Contractor

We are very pleased with the choice we made to go with Polymaster due to the quality and excellent service. We will endeavour to use more Polymaster tanks as we continue to upgrade our property.

Matthew

Bridgewater SA

What sizes do Polymaster slimline tanks come in?

Polymaster offers slimline tanks between 600 L and 5,000 L, including the 2,020 L Builder Tank with pump and household change-over feature.

Do any slimline tanks include a pump for household use?

Yes – all slimline tanks can be supplied with optional pump packages. For example, you can choose a household pump system for integration with toilets and washing machines, or a garden pump system for outdoor water use. The Builder Tank includes a built-in pump and change-over system, but this option is also available across the slimline tank range.

Where can I find Polymaster slimline tanks in Australia?

You’ll find these tanks at stockists across Victoria, South Australia, New South Wales, and via delivery to Melbourne, regional VIC, Adelaide, SA, and the NSW Riverina.

How do I choose the right slimline tank size?

Size depends on your household water use, catchment area, and space. Dive deeper into our blog Choosing the Right Water Tank for Your Property: A Comprehensive Guide for expert sizing help.

How do I keep my slimline tank clean?

Maintain your tank by keeping gutters clear, using leaf and first-flush guards, and investing in antimicrobial protection. Discover more in Keeping Your Water Tank Clean & Healthy here.

What should I keep in mind when buying a water tank?

Consider timing, required capacity, style, standards compliance, water hygiene, and warranty coverage. Get a helpful checklist in 6 Things to Keep in Mind When Getting a Water Tank.

Are Polymaster slimline tanks designed for harsh Australian weather?

Absolutely - they are built to handle UV, heat, and all-day exposure, featuring robust construction designed specifically for the Australian climate.

Do slimline tanks come with a warranty or design life?

Polymaster tanks are built with long-term reliability in mind and come with a 25‑year design life, reflecting our confidence in their quality.

How do I maintain my slimline rainwater tank?

Regular checks every 3‑6 months are recommended - keep gutters, screens, and inlets clean, and flush out sediment. More tips are available in our Blog on rainwater tank care.

Why choose Polymaster tanks for water storage?

Our tanks are engineered for durability, are Australian-made, and backed by over 25 years of design life. Learn more about quality and longevity on our About Us page.

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Get in touch

Call Polymaster today on 1800 062 064

Contact our team Find your local store